Skip to main content
SpringerLink
Log in

Effect of Long-term Ageing on the Microstructure and Mechanical Properties of Creep Strength Enhanced Ferritic P91 Steel

  • Technical Paper
  • Published:
Transactions of the Indian Institute of Metals Aims and scope Submit manuscript

Abstract

Present paper describes the microstructural and mechanical properties of creep strength enhanced Cr–Mo P91 steel subjected to a regime of tempering time 720–3000 h. Study on the effect of varying tempering time on microstructure revealed increase in size of precipitates, amount of precipitates and grain size. It was also observed that compared to particle size, effect of tempering time was more pronounced on the grain size. The various phases that formed in the tempered P91 steel were analyzed by X-ray diffraction. Yield strength and tensile strength were observed to be decreasing with increase in tempering time. Increase in duration of tempering time led to decrease in impact toughness of P91 specimens possibly due to cracking of secondary phase particles during straining and decohesion at precipitates and matrix interface. The tempering time also observed to be affecting the hardness of P91 steel but less pronounced compared to the yield strength and tensile strength. Tensile fracture and impact toughness fracture surfaces were studied by using scanning electron microscope. The fracture surface of tempered P91 tensile specimens indicated increased dimples and presence of fewer cleavage facets. The fracture surface of P91impact toughness specimens exhibited both inter lath-decohesion and ductile dimple tearing.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18

Similar content being viewed by others

References

  1. Hald J, Int J Press Vessels Pip 85 (2008) 30.

    Article  Google Scholar 

  2. Yoshizawa M, and Igarashi M, Int J Press Vessels Pip 84 (2007) 37.

    Article  Google Scholar 

  3. Scheu C, Kauffmann F, Zies G, Maile K, Straub S, and Mayer K H, Zeitschrift fur Metallkunde 96 (2005) 653.

    Article  Google Scholar 

  4. Norena C H, and Bruzzoni P, Mater Sci Eng A, 527 (2010) 410.

    Article  Google Scholar 

  5. Shibli A, and Starr F, Int J Press Vessels Pip 84 (2007) 114.

    Article  Google Scholar 

  6. Blach J, Falat L, and Sevc P, Eng Fail Anal 16 (2009) 1397.

    Article  Google Scholar 

  7. Zhu L H, Zhao Q X, Gu H C, and Lu Y S, Eng Fract Mech 64 (1999) 327.

    Article  Google Scholar 

  8. Senior B A, Noble F W, and Eyres B L, J Acta Metall 36 (1988) 1855.

    Article  Google Scholar 

  9. Okamura H, Ohtani R, Saito K, Kimura K, Ishii R, Fujiyama K, Hongo S, Iseki T, and Uchida H, Nucl Eng Des 193 (1999) 243.

    Article  Google Scholar 

  10. Maruyama K, Swada K, and Koike J, ISIJ Int 41 (2001) 641.

    Article  Google Scholar 

  11. Sawada K, Taneike M, and Kimura K, ISIJ International 44 (2004) 1243.

    Article  Google Scholar 

  12. Ghassemi-Armaki H, Chen RP, and Maruyama K, Mater Lett 63 (2009) 2423.

    Article  Google Scholar 

  13. Aghajani A, Somsen C, and Eggeler G, Acta Materialia 57 (2009) 5093.

    Article  Google Scholar 

  14. Ghassemi Armaki H, Chen R P, Maruyama K, and Igarashi M. Metall Mater Trans A 42 (2011) 3084.

    Article  Google Scholar 

  15. Kafexhiu F, Vodopivec F, and Vojvodic Tuma J, Mater Tech 46 (2012) 459.

    Google Scholar 

  16. Yan W, Wang W, Shan Y, and Yang K, Mater Sci 7 (2013) 1.

    Google Scholar 

  17. Dimmer G, Weinert P, Kozeschink E, and Cerjak H, Mater Charact 51 (2003) 341.

    Article  Google Scholar 

  18. Sawada K, Kushima H, Kimura K, and Tabuchi M, ISIJ Int 47 (2007) 733.

    Article  Google Scholar 

  19. Danielsen H K, and Hald J, Mater Sci Eng A 505 (2009) 169.

    Article  Google Scholar 

  20. Golpayegani A, Andren H O, Danielsen H, and Hald J, Mater Sci Eng A 489 (2008) 310.

    Article  Google Scholar 

  21. Pandey C, and Mahapatara MM, in Proc Effect of soaking temperature and time on microstructure and mechanical properties of P91 steel: 23rd Int. Conf: on Processing and Fabrication of Advanced Materials, IIT Roorkee, India (2014).

Download references

Author information

Authors and Affiliations

  1. Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, Uttrakhand, 247667, India

    C. Pandey & M. M. Mahapatra

Authors
  1. C. Pandey
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. M. Mahapatra
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to M. M. Mahapatra.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Pandey, C., Mahapatra, M.M. Effect of Long-term Ageing on the Microstructure and Mechanical Properties of Creep Strength Enhanced Ferritic P91 Steel. Trans Indian Inst Met 69, 1657–1673 (2016). https://doi.org/10.1007/s12666-015-0826-z

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12666-015-0826-z

Keywords

Search

Navigation